highaltitude.log.20131207

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[08:53] <DL7AD> guten morgen DL1SGP1 :) alles gute! ;)
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[09:04] <G0HDI> 'Morning all.
[09:04] <mclane> Hello
[09:05] <G0HDI> I see POP1 being tested near me this morning.
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[09:14] <Herman-PB0AHX> verry good morning to all
[09:14] <x-f> good morning
[09:16] <Herman-PB0AHX> on wat time POP1 going flying ??
[09:17] <G0HDI> I think it just a test Herman.
[09:18] <Herman-PB0AHX> ok tnx info i need to track ballons today hihihihi lol
[09:19] <G0HDI> So do I but nothing planned on UKHAS irt seems.
[09:20] <G0HDI> I have a lousy cold, so need cheering up
[09:21] <wd8mnv> if it's the same cold i've had, you may have to see Dr Whisky for that scratchy throat
[09:21] <Herman-PB0AHX> yessss the wind today is down now here i can used the antennes agn
[09:22] <G0HDI> I'm over the scatchy throat. trying to stop the nose tap now. Staying in the shack today
[09:24] <G0HDI> That's good Herman. Looks like you'll have use them for normal radio instead of balloons today.
[09:24] <Martin_G4FUI> G0HDI, Self-imposed exile, or family pressure ?
[09:25] <G0HDI> Self imposed. I tried ignoring it yesterday and went out. Bad idea!. Live alone anyway, so no ear-ache from 'Her indoors' hi
[09:28] <G0HDI> I suppose only gps used on tethered tests, I could probably pick up radio of POP1, if used, from here..
[09:28] <Martin_G4FUI> Well at least you can chat to us lot! Sympathies, hope you get over it soon ...
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[09:30] <Herman-PB0AHX> i hope today 1 ballon go to flying
[09:30] <G0HDI> Matter of time. I'm not daft enought to fall for all that rubbish sold at extortionate prices as so called instant cures.
[09:32] <Martin_G4FUI> Decongestants usually help me somewhat
[09:32] <Herman-PB0AHX> now it is koffie time here
[09:33] <Martin_G4FUI> Bit early here, but when we have caught up with Dutch time . . . :)
[09:35] <G0HDI> I fing Fisherman's friend helps me avoid the hacking cough stage. Then when the hankies run out I switch to vests hi. After ther third the virus has just about got cheesed off with company.
[09:36] <G0HDI> My
[09:36] <G0HDI> Glad to get it out of the way before xmas anyway.
[09:37] <Martin_G4FUI> That's called "putting a positive spin on it"!
[09:39] <G0HDI> Right!. I'm up at 07:00 latest. My kittens (Who are systematically reducing my place to rouble) wont allow me to sleep any later anyway
[09:41] <G0HDI> Rubble!. Stone me!, this cold is playing hell with my spolling hi
[09:42] <G0HDI> I need to track something *sigh*
[09:42] <PE2G> Good morning. Any chance of a balloon flying this weekend?
[09:43] <Martin_G4FUI> We almost had an overdose last weekend!
[09:43] <G0HDI> What happened to the Transatlantic attempt anyway? no beacon received here. Have we given up on that one?
[09:43] <Herman-PB0AHX> PE2G: good morning i asking t also but not yet know
[09:44] <G0HDI> Nothing on UKHAB, so guess not.
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[09:45] <PE2G> G0HDI: Thanks. POP1 is on the map thoug
[09:45] <PE2G> (Wishfull thinking)
[09:47] <Herman-PB0AHX> let we hope
[09:47] <G0HDI> Yes I know, but probably just tethered testing. I see gps postion showing is on the aprs.fi map
[09:48] <PE2G> Yeah
[09:50] <Herman-PB0AHX> but fl-digi is the empty list here, so for me it will not happen much, I think
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[09:51] <G0HDI> Yep. Well you can always pop in and see me in the shack if you're bored hi http://www.qsl.net/g0hdi/shackcam.htm
[09:51] <PE2G> Herman-PB0AHX: have you tried $50SAT yet?
[09:52] <PE2G> G0HDI: Nice!
[09:52] <Herman-PB0AHX> yes i hrd him very well
[09:52] <Herman-PB0AHX> but I'm going to get ready to receive FUNcube I'm back later
[09:54] <G0HDI> I was going to try funcube reception, but the software wouldn't work for me for some reason.. I gave up on it.
[09:57] <PE2G> G0HDI: And how about $50SAT?
[09:58] <G0HDI> No I just tried to use what I think was called 'The Dashboard' How do you receive $50 SAT?
[09:59] <PE2G> I understand it uses RTTY like we know it
[09:59] <PE2G> http://www.50dollarsat.info/
[09:59] <PE2G> On 437.505 MHz +/- 10 kHz doppler shift
[10:00] <G0HDI> Oh!.. Maybe Simon's SDR Console covers it . I'll have look in a minute
[10:02] <PE2G> herie is its current position: http://www.satview.org/?sat_id=39436U
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[10:04] <G0HDI> Neat!..Does that mean the next pass is over the UK...Near enough?
[10:04] <PE2G> Yeah, even current position is within range
[10:05] <PE2G> But i'm not qrv in that direction
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[10:07] <G0HDI> I'm on 437.505
[10:07] <PE2G> Here are pass forecasts: http://www.satview.org/5d.php?sat_id=39436U
[10:08] <x-f> woo, i just heard it! clear two traces of RTTY on the waterfall
[10:08] <x-f> i think
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[10:09] <G0HDI> What baud 50?
[10:09] <PE2G> 100 bd
[10:10] <G0HDI> Ok
[10:10] <PE2G> But I couldn't find the other RTTY settings yet
[10:10] <G0HDI> You on 437.505?
[10:12] <PE2G> Yeah, but the sat is in the wrong direction for me. No chance there
[10:12] <PE2G> This pass should do it for me: http://www.satview.org/map_pass.php?lat_aos=70.9922&lon_aos=6.8705&lat_los=34.9260&lon_los=-12.9953&lat_local=51.9725&lon_local=6.71944
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[10:15] <G0HDI_> There's no footprint on the tracking map. But passing Nigeria anyway so well out of range.
[10:18] <PE2G> Above pass over Ireland, Scotland, will be at ~11:35 UTC
[10:18] <x-f> http://i.imgur.com/vWdnHO5.png - trying to decode it now
[10:20] <G0HDI_> I'll listen out 11:35, thanks!
[10:20] <eroomde> not for pico payloads, but this is a lovely lovely parachute
[10:20] <eroomde> http://aeroconsystems.com/cart/all-parachutes/72-inch-orange-parachute/
[10:21] <jcoxon> :-D
[10:22] <eroomde> you've flown under it jcoxon
[10:22] <eroomde> one of the sstv pegasuses
[10:22] <eroomde> on nova 18
[10:22] <jcoxon> the one that landed in a hedge
[10:22] <eroomde> yep
[10:22] <eroomde> just behind a farm
[10:22] <jcoxon> oh i did love doing sstv
[10:23] <eroomde> happy times
[10:23] <jcoxon> indeed
[10:24] <PE2G> x-f: Can you figure out what the other RTTY settings are?
[10:24] <eroomde> that was a fun launch actually
[10:24] <eroomde> http://www.flickr.com/photos/cuspaceflight/sets/72157624203062811/
[10:24] <eroomde> lovely day, nice buzz from the various people flying
[10:25] <jcoxon> i still have that payload box
[10:25] <jcoxon> its in my car
[10:28] <x-f> PE2G, with 620 Hz, 100 baud, 8n1.5 - ,$$$ 0?¿Ú*#j(22N%("1,8,85,,102,84,3723,*?6LµÇ:/w
[10:28] <PE2G> x-f: Great!
[10:29] <x-f> i'm using RTLSDR with HABamp, 70cm GP on the roof
[10:29] <PE2G> How bad was the doppler shift?
[10:29] <eroomde> are you on the roof too?
[10:30] <x-f> eroomde, no, it's snowing outside :)
[10:30] <x-f> PE2G, transmission is short and RFM22's drift kind of compensates it
[10:30] <PE2G> OK
[10:31] <PE2G> I suppose the best strategy is to record the audio first, and try to decode later?
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[10:32] <x-f> yep
[10:33] <eroomde> gpredict will tune your rig for you iuw
[10:33] <eroomde> to compensate for drift
[10:33] <eroomde> doppler, even
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[10:41] <PE2G> G0HDI: HAM cat :)
[10:42] <G0HDI_> my relief crew
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[11:04] <PE2G> $50SAT's footprint at 11:39 UTC: http://s17.postimg.org/5xlcf0v3z/Scr_Sav001.jpg
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[11:04] <PE2G> $50SAT's footprint at 11:45 UTC: http://s12.postimg.org/9mn95xc8t/Scr_Sav002.jpg
[11:06] <G0HDI> Should hear something any time soon then
[11:07] <G0HDI> 100 baud 620 shift ok?
[11:08] <PE2G> Yes. At AOS my doppler shift freq would be 437.514
[11:09] <G0HDI> Nuisance, doppler shift isn't it
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[11:13] <PE2G> Yes, I'll make an audio recording first
[11:14] <G0HDI> I'll just try to grab something live this time
[11:28] <PE2G> Radio horizon over central Norway now
[11:29] <G0HDI> ok
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[11:31] <PE2G> South Norway
[11:35] <PE2G> Recorded that. Short RTTY.
[11:37] <G0HDI> nothing yet
[11:45] <G0HDI> Well that was fun hi. Not a nibble!
[11:49] <G0HDI> Oh well, that's it for now. Going for a nap as I didn't get much sleep last night with this cold. Ovwa!
[11:50] <PE2G> Bye
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[12:01] <PE2G> $$$$50SAT,128,,247,,,45,3l 0ÿ$&ó,82,85,3703,*48
[12:02] <x-f> very nice!
[12:02] <PE2G> $$$$50SAT,128,,247,,,47,3,,21,147,’Ð>,85,3703,*44
[12:03] <PE2G> Decoding "live" from the recording now
[12:08] <PE2G> $$$$$50SAT,128,,#~$’èe43,21,142,85,,102,85,3703,(7
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[12:14] <Herman-PB0AHX> PE2G: u dit a good job u writing $50sat very good
[12:16] <PE2G> Herman-PB0AHX: Well, reasonably, not one full string
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[12:48] <jcoxon> hehe it is quiet today
[12:48] <jcoxon> HAB occurs in waves
[12:48] <gonzo__> what, leo doesn't have one flying?
[12:49] <Herman-PB0AHX> PE2G: i have also no completed line
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[12:50] <PE2G> I'm putting the $50SAT recording online. Maybe someone can get more data out of it than I could
[12:50] <Herman-PB0AHX> u put the link here ?
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[12:50] <PE2G> Yes, in a moment, still uploading...
[12:51] <Herman-PB0AHX> ok
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[12:56] <PE2G> Unedited WAV recording (171 MB): http://fwestra.home.xs4all.nl/UPL/$50SAT%20-%20Dec7_1125UTC.wav
[12:56] <PE2G> First data from minute 5:19
[13:03] <jcoxon> anyone played with a teensy 3.0?
[13:03] <jcoxon> quite an interesting platform as an introduction to ARM
[13:06] <Geoff-G8DHE> PT but you never know http://www.g8dhe.net/bongo_images/rearview_cam_voltage.jpg
[13:06] <Geoff-G8DHE> OT even!
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[13:09] <mfa298> Geoff-G8DHE: ouch, that's a lot of power for it to drop.
[13:09] <mfa298> and no doubt it's just a cheap regulator or even just a bunch of diodes/resistors in that block.
[13:12] <Geoff-G8DHE> Yup it gets HOT thankfully I tested in the shack before cutting of the block and fitting a very slim line plug which would have put 112 volts up the power lead!
[13:12] <Geoff-G8DHE> 12 volts that is!
[13:12] <Geoff-G8DHE> Right back out to the van to fit ....
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[14:56] <DL7AD> evening
[14:57] <Maxell> hai
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[16:23] <ATCC> Anyone know the frequency POP1 is on?
[16:28] <chrisstubbs> I would expect they are just testing ATCC
[16:28] <mfa298> I think it's just testing
[16:28] <ATCC> Yes I suspect they are but I shold be able to hear them as I am only 2 miles away!
[16:28] <chrisstubbs> no flight doc i can see
[16:29] <chrisstubbs> 434.65MHz USB RTTY 300 baud 425Hz shift ASCII-7 no parity 1 stop bit is their most recent
[16:29] <craag> ATCC: Try 434.650
[16:29] <mfa298> I think it might be 434.650 but I'm not sure I'd hear it and it's probably less than 2km from me
[16:30] <ATCC> Chis Ill take a look current sniffing on 502 which is not them!
[16:30] <craag> ATCC: I believe it's indoors on a table though, so probably hasn't got much range at all.
[16:33] <craag> ATCC: Are you G4MYS?
[16:34] <ATCC> Craag you observant mate!
[16:34] <craag> Phil M0DNY from the uni club here :)
[16:34] <ATCC> call that a yes!
[16:35] <craag> POP1 is also down the hill on the opposite side of campus to you, I'm a street north of the uni campus and I can barely see it on the waterfall.
[16:35] <ATCC> like you Phil hiding HI
[16:36] <ATCC> So Can I confirm them .650?
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[16:39] <craag> ATCC: Yep, 434.651.720 dial freq here
[16:39] <craag> It's 300 baud with a high idle tone
[16:40] <ATCC> all I can hear there is a tune up type whistle is that it?
[16:41] <craag> If I hadn't blown up my preamp the other day I might be able to decode it :/
[16:41] <craag> No probably not
[16:42] <craag> As I say, I doubt you'll see it at all as the hill is in the way
[16:45] <ATCC> I some how douv bouby t as well but if you dont try! I Did make a passive splitter to I could drive two radios with one aerial, but its too lossy, also built a preamp, but that proved to amp everything,, thus too noisy!,- idea being to split it after amplification, so were down to putting up ( yet ) another aerial!
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[16:50] <craag> ATCC have you seen our latest toy? http://websdr.suws.org.uk/
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[16:58] <ATCC> CRAAG perhaps it may be a idea to present a talk on this at the Radio club some time, you may inspre the others on SDR thank you for telling me about it as you say the others do seem to go for HF Andy
[17:01] <craag> ATCC: I'd be happy to, at some point in the new year maybe. Yes this is up at a site in Basingstoke which has fantastic LOS for VHF/UHF+ so that's the primary focus. There might be a couple of HF bands appearing on there in due course however.
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[17:07] <ATCC> Basing stoke yes good interesting area! Ill advise Malc G0WFQ then
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[19:40] <LeoBodnar> Darkside: ping
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[19:42] <SP9UOB-Tom> evening all
[19:42] <Upu> give him an hour Leo its 6am over there :)
[19:42] <Upu> evening Tom
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[20:02] <SP9UOB-Tom> evening all
[20:02] <SP9UOB-Tom> oops ;-) dejavu ;-)
[20:02] <SP9UOB-Tom> Upu: look http://amsat-uk.org/2013/10/22/new-satellite-segment-in-iaru-region-2-bandplan/
[20:04] <Upu> indeed :)
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[20:14] <hih> any word on the N2NXZ balloon attempt?
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[20:16] <mfa298> hih: I think assumed MIA
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[20:28] <hih> thanks
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[20:56] <jcoxon> evening all
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[20:57] <SP9UOB-Tom> evening
[20:57] Action: SP9UOB-Tom is looking for a switch to turn of this wind....
[20:58] <Upu> oh it made it to Poland ?
[20:58] <Upu> was a bit breezy
[20:58] <Upu> hey SP9UOB-Tom http://i.imgur.com/Umh9OY9.jpg
[20:58] <SP9UOB-Tom> yes, we have it since friday
[20:58] <SP9UOB-Tom> Upu... wait.. :-)
[20:58] <Upu> bad internets ?
[20:59] <SP9UOB-Tom> no im looking for my trackers photo
[20:59] <Upu> ah ok :)
[21:01] <SP9UOB-Tom> Upu: http://sp9uob.verox.pl/pico/picov4.jpg
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[21:01] <SP9UOB-Tom> Upu: it is doing APRS/RTTY now http://aprs.fi/telemetry/a/SP9UOB-11
[21:01] <craag> Upu wins :)
[21:01] <Upu> hehe all the same parts not necessarily in the same order :)
[21:02] <Upu> well SP9UOB-Tom wins
[21:02] <Upu> as mine isn't currently working
[21:02] <craag> :( whats the issue?
[21:03] <Upu> can't read the µC / set fuses
[21:03] <Upu> not sure why
[21:03] <Upu> going to do a board with just the µC on it
[21:03] <Upu> I went all up as I had a stencil and its based on a design I knew to work
[21:03] <Upu> but something has crept in
[21:04] <Upu> but stencil and new oven is <3
[21:04] <SP9UOB-Tom> and the back: http://sp9uob.verox.pl/pico/picov4back.jpg
[21:04] <craag> That sucks, hopefully you find the issue soon
[21:04] <craag> Yeah I bet!
[21:04] <Upu> I have nothing on the rear of mine
[21:04] <Upu> pressure sensor ?
[21:04] <Upu> that could be helpful
[21:04] <SP9UOB-Tom> Upu: yes
[21:04] <Upu> thats on my next one :)
[21:05] <SP9UOB-Tom> upu: im calculating pressure altitude also
[21:05] <Upu> I'll work it out
[21:05] <Upu> can't be anything too complex
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[21:05] <Upu> SP9UOB-Tom steal my snap off header design and loose the through hole :)
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[21:06] <Upu> its just not demeaning of such a small board to have ugly 2.54" pitch holes in it :)
[21:06] <SP9UOB-Tom> Upu: sure :-)
[21:06] <craag> I'm already stealing your snap-off header design :P
[21:06] <SP9UOB-Tom> it is still in alpha stage :-)
[21:06] <Upu> well that might actually be the issue as I only changed two things from PAVA8 and that was one of them :)
[21:07] Nick change: KingJ_ -> KingJ
[21:07] <craag> Doesn't look like there's much on it to go wrong
[21:07] <Upu> well on the first board I did solder leaked down the snap off holes and shorted the programmer out
[21:07] <Upu> so watch out for that
[21:07] <SP9UOB-Tom> Upu: look at the vias near si4464 :-) I have to remove soldermask to debug with oscilloscope :-)
[21:08] <Upu> uff
[21:08] <SP9UOB-Tom> anyway Hackvana ruulz :-)
[21:09] <SP9UOB-Tom> Upu: does the board have PSU? I cant see any
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[21:10] <LeoBodnar> I want to see some fresh desgns
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[21:10] <Upu> yeah it mezzanines on
[21:10] <Upu> depending if you want step up or solar
[21:10] <Upu> I have some pics somewhere 1 sec
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[21:11] <SP9UOB-Tom> Upu: ah ok
[21:11] <SP9UOB-Tom> LeoBodnar: but 'Leo - style' boaard is optimal ;-)
[21:12] <Upu> http://imgur.com/a/jO635
[21:12] <Upu> also acts as the "can" for the RF section
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[21:12] <SP9UOB-Tom> cool :-)
[21:13] <Upu> well next step is RX LeoBodnar
[21:13] Nick change: mfa298_ -> mfa298
[21:13] <LeoBodnar> yeah I agree
[21:13] <SP9UOB-Tom> Upu: i have working cutoff based on native rfm22b packets :-)
[21:13] <Upu> how do you transmit them ?
[21:14] <SP9UOB-Tom> i have dedicated device with pic and rfm22b
[21:14] <Upu> you will need more than 100mW though ?
[21:14] <SP9UOB-Tom> when baloon is in the tree
[21:14] <SP9UOB-Tom> and im below the payload - its working like a charm :-)
[21:15] <Upu> Darkside recorded the output then retransmitted it via something with some power
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[21:16] <SP9UOB-Tom> im turning rfm rx on shotr after CW ID transmission, and some kind of "handshake" packet is transmited
[21:16] <SP9UOB-Tom> so when "remote controller" is in range - i have confirmation and i can fire some functions
[21:17] <Upu> be interested to know what "in range" is
[21:18] <LeoBodnar> Hmm Tom why do you have an extra cap from TX+ to GND?
[21:18] <mfa298> hopefully the top of a tree would be in range (assuming it's got cutaways from the payload to any lines)
[21:18] <SP9UOB-Tom> they talk to each other, when payload is in a tree - range is over 100m
[21:19] <SP9UOB-Tom> LeoBodnar: in RF path?
[21:19] <LeoBodnar> On the SI4464 RF output
[21:20] <SP9UOB-Tom> LeoBodnar: its a shunt capacitor - in parallel to internal fet capacitance - i have redesigned matching
[21:21] <SP9UOB-Tom> not based on datasheet, but based on other documents describing E-class PA
[21:22] <LeoBodnar> I think Si4464 has quite a large internal Cshunt as it is designed for lower freq operation than other Si446x members
[21:22] <SP9UOB-Tom> and it is performing very well at 144 MHz
[21:22] <LeoBodnar> OK then
[21:22] <SP9UOB-Tom> LeoBodnar: datasheet says 2.5 pF
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[21:25] <LeoBodnar> I have seen a different figure in one of the appnotes but if it works, then it works! :D
[21:26] <SP9UOB-Tom> LeoBodnar: :-) i have oscilloscope up to 200 MHz so i cannot test the design at 434 MHz
[21:26] <SP9UOB-Tom> but at 144MHz its ok :-)
[21:27] <LeoBodnar> So you are sending HAB telemetry on 2m?
[21:27] <SP9UOB-Tom> LeoBodnar: yes, rtty and APRS
[21:27] <Upu> making use of the new ITU band ?
[21:28] <SP9UOB-Tom> APRS - compressed style complete data frame is only 40 bytes :-)
[21:28] <SP9UOB-Tom> Upu: yeah!
[21:28] <SP9UOB-Tom> [Dec 07 2013 - 22:28:00]
[21:28] <SP9UOB-Tom> from:1 SP9UOB-11 > APDST9 via WIDE1-1 WIDE2-2 UIv PID=F0 40 bytes
[21:28] <SP9UOB-Tom> !/5(6pS4#rOr!>/A=000892 |!m-m!(Y7WL!?!<|
[21:28] <SP9UOB-Tom> This is a local station
[21:28] <SP9UOB-Tom> To igate: SP9UOB-11>APDST9,WIDE1-1,WIDE2-2,qAR,SP9UOB-15:!/5(6pS4#rOr!>/A=000892 |!m-m!(Y7WL!?!<|
[21:31] <LeoBodnar> So is telemetry over HAM bands technically broadcasting or not?
[21:32] <LeoBodnar> APRS at least has destination address while HAB format does not
[21:33] <SP9UOB-Tom> im not a lawyer ;-)
[21:33] <craag> It's a beacon
[21:33] <craag> So technically broadcasting, yes.
[21:34] <craag> But allowed... not a clue why :P
[21:34] <LeoBodnar> Wouldn't that be slightly dodgy ?
[21:34] <LeoBodnar> Broadcasting is not allowed in UK licence terms
[21:34] Action: craag checks his section 2..
[21:35] <SP9UOB-Tom> LeoBodnar: and transmitting to specified destination?
[21:36] <craag> LeoBodnar: P23 of Section 2
[21:36] <craag> (2) It is permissible to transmit positional information using automatic position reporting
[21:36] <craag> software on a spot frequency of 144.800 MHz at any one temporary location not within 50
[21:36] <craag> km of NGR TA 012869. The maximum permitted period of unattended operation is 30
[21:36] <craag> minutes
[21:36] <craag> (For an unattended beacon)
[21:37] <LeoBodnar> APRS is sort of OK-ish
[21:37] <SP9UOB-Tom> what is NGR TA 012869. ?
[21:37] <LeoBodnar> but continuous RTTY / Domino /etc is a bit questionable
[21:38] <LeoBodnar> National grid reference
[21:38] <craag> LeoBodnar: This is one of the points we brought up with the whole airborne thing.
[21:38] <Geoff-G8DHE> Every 15 minutes make the tracker give the owners callsign and its own , then its in comm's wit the owner ?
[21:38] <SP9UOB-Tom> and what is the place described by TA 012869
[21:39] <craag> Geoff-G8DHE: That would get past the broadcasting bit!
[21:39] <Geoff-G8DHE> Possibly an area in Yorkshire near some Golfbals ?
[21:39] <craag> Also I notice you're not allowed to use more then 25W erp PEP for beacons.
[21:40] <LeoBodnar> http://www.geograph.org.uk/photo/190611
[21:40] <SP9UOB-Tom> LeoBodnar: thanks
[21:42] <Laurenceb_> secret area??
[21:42] <LeoBodnar> gchq.websdr.org
[21:42] <SP9UOB-Tom> http://www.alancordwell.co.uk/hfradio/irton.html
[21:42] <SP9UOB-Tom> nadinenka's dipole
[21:43] <Laurenceb_> ah
[21:43] Action: Laurenceb_ waves to the NSA
[21:43] <mfa298> Laurenceb_: you probably broken the national secrets act by looking at that site!
[21:43] <Laurenceb_> uh oh
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[21:44] <mfa298> aparently the BT tower used to be covered so you couldn't legally take pictures of it :S
[21:44] <Geoff-G8DHE> Still doesn't appear on maps !
[21:44] Action: SP9UOB-Tom is planning a trip to DUGA complex near Czernobyl: http://en.wikipedia.org/wiki/Russian_Woodpecker
[21:45] <SP9UOB-Tom> those antennas are awesome :-)
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[21:51] <LeoBodnar> Tom, what sections of 2m do you and Artur transmit RTTY on from balloon?
[21:52] <SP9UOB-Tom> LeoBodnar: Artur was transmitted near 144.700, but im on 144.010
[21:52] <Laurenceb_> https://my.st.com/static/myst_down.html
[21:52] <Laurenceb_> how do i sentences
[21:52] <SP9UOB-Tom> http://amsat-uk.org/2013/10/22/new-satellite-segment-in-iaru-region-2-bandplan/
[21:52] <LeoBodnar> I guess as balloon traverses the country borders if the frequency is potentially can be used for duplex operation it can piss off a few locals
[21:54] <jcoxon> its envetiablly a grey area
[21:54] <SP9UOB-Tom> LeoBodnar: i also want to try to transmit on input frequency of amateur satellite
[21:54] <SP9UOB-Tom> with linear transponder :-)
[21:54] <SP9UOB-Tom> its worth a try :-)
[21:54] <mfa298> you may find bandplans are similar (especially within an ITU region)
[21:55] <mfa298> and moving outside of Region 1 there's not many places covered by TR61/01
[21:55] <LeoBodnar> if telemetry is in the "deaf" devices section then it should be OK
[21:55] <DL1SGP> SP9UOB-Tom: I like your crazy ideas :)
[21:56] <SP9UOB-Tom> DL1SGP: ;-)
[21:57] <LeoBodnar> I have been blasting on 145.825 with absolutely no effect
[21:57] <SP9UOB-Tom> LeoBodnar: But with FM right?
[21:57] <SP9UOB-Tom> LeoBodnar: i want to try regular RTTY :-)
[21:57] <SP9UOB-Tom> over linear transponder
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[22:19] <SP9UOB-Tom> night all
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[22:25] <DL7AD> goo evening
[22:27] <DL7AD> Upu: do you know the bim1h module?
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[22:30] <anerDev> hello ! Anyone =
[22:30] <anerDev> ?
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[22:35] <Upu> yes DL7AD I can get them
[22:35] <DL7AD> do you know if RX_ENABLE can be pulled down all the time?
[22:36] <DL7AD> *with parallel transmitting
[22:36] <craag> DL7AD: From memory the datasheet says that will cause 'undefined operation'
[22:36] <craag> And is not recommended.
[22:37] <DL7AD> craag: :/ okay then switching them
[22:38] <craag> Yep Note 2 at the bottom of page 3
[22:39] <anerDev> guys, I have a question: this is good for receive the signal ? v
[22:39] <anerDev> http://www.handyradio.co.uk/product/baofeng-uv-5re-plu-dual-band-136-174400-520mhz-radio-uv-5r-uv5r-copy/
[22:40] <craag> anerDev: Not for RTTY.
[22:40] <craag> It's FM only.
[22:41] <anerDev> :/
[22:41] <anerDev> and for RTTY with similar price ?
[22:41] <craag> DL7AD: Easy to just drive the TX, and then use a single transistor NOT circuit to drive the RX from that, or vice versa.
[22:42] <craag> anerDev: RTL-SDR is the closest you're going to get, SSB receivers for RTTY are not cheap.
[22:43] <craag> anerDev: Although you might be able to find a second-hand 434MHz SSB scanner on ebay for a reasonable price.
[22:44] <craag> second/third/fourth-hand
[22:45] <anerDev> thank you
[22:45] <anerDev> now I'm search
[22:45] <mfa298> things like the mvt-7100 and similar receivers are probably the cheapest non sdr option
[22:45] <anerDev> I go to search
[22:45] <mfa298> although not that cheap
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[22:58] <DL7AD> craag: that way? http://puu.sh/5FoLJ.png
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[22:59] <CS8ABA> GE All! Any news on N2NXZ baloon?
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[23:03] <craag> DL7AD: Yep
[23:03] <LeoBodnar> sharing base resistor between two BJTs is not a good idea
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[23:04] <craag> 10K is more than enough current though?
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[23:04] <DL1SGP> Guten Morgen DL7AD
[23:04] <DL1SGP> hi folks
[23:04] <craag> tbh I was thinking you could drive the RX_enable BJT from the TX_enable signal, but your way is probably safer.
[23:05] <DL7AD> guten morgen DL1SGP ;)
[23:05] <DL7AD> steht deine antenne noch DL1SGP ?
[23:05] <DL1SGP> nein
[23:05] <DL1SGP> siehe mailinglist
[23:05] <DL7AD> hö? wer hat sie runtergeholt?
[23:05] <DL7AD> du oder der wind?
[23:05] <DL1SGP> Der Xaver
[23:06] <LeoBodnar> if transistors are at different temperatures or from different batches their Vbe will be different
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[23:06] <DL7AD> oO
[23:06] <LeoBodnar> The lower Vbe BJT will steal all the current
[23:07] <craag> LeoBodnar: Of course, yeah you're right.
[23:07] <LeoBodnar> But in China it will works probably
[23:07] <craag> DL7AD: If doing it that way, you'll need a seperate base resistor for each of the BJTs.
[23:07] <LeoBodnar> They would probably not even bother with R8
[23:08] <craag> Haha no
[23:08] <LeoBodnar> Let mcu limit the current :D
[23:09] <LeoBodnar> *spelling
[23:09] <DL7AD> what about changing the resistor to 4.7k?
[23:10] <DL7AD> instead of 10
[23:12] <craag> DL7AD: Nope, you'll need 2 seperate ones, one for each transistor.
[23:12] <craag> If transistor a requires 0.6v to turn on, and transistor b requires 0.65v
[23:13] <craag> then the voltage after your resistor will be dragged down to 0.6v by transistor a
[23:13] <craag> so transistor b won't switch on!
[23:13] <DL7AD> hm okay....
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[23:14] <craag> THey each need their own resistors, so they can work at their own voltages
[23:18] <DL7AD> craag: http://puu.sh/5Fq51.png
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[23:25] <craag> DL7AD: That'll do nicely :)
[23:29] <DL7AD> craag: thx
[23:43] <craag> np :) gn!
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[00:00] --- Sun Dec 8 2013